The No. 2 Han tomb at Shuangbaoshan of Mianyang, Sichuan Province, a tomb of the early and middle Western Han Dynasty, was excavated in 1995 and is the largest wooden-coffin tomb ever found in Sichuan Province. Despite early grave-robbing, still unearthed were more than 1,000 relics, among which eight pieces of a silver-threaded jade suit and an honor guard composed of a large number of lacquered horses, equestrian figurines and chariots unearthed from the tomb indicate the nobility of the tomb owner. Aiming to protect the lacquerware unearthed from the tomb, and the workmanship, we carried out analyses of cross-section morphology, types of pigments and chemical composition and degree of aging of lacquer films of Sample Q1 (a lacquer plate), Sample Q2 (a lacquer flanged cup), Sample Q3 (a lacquer bowl) and Sample Q4 (a lacquered wooden warehouse ) using scanning electron microscopy and energy dispersive spectrometry (SEM-EDS), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectrometry.  FTIR analysis shows that the lacquer film is composed of lacquer and pigments but no tung oil. Cross-section analysis shows that none of the four samples has a lacquer plaster layer. The inside of Sample Q1, Q2 and Q4 are all coated with red lacquer on the surface of a black primer, the inside of Sample Q3 and the outsides of Sample Q1, Q2 and Q3 are all coated with red ornamentation on the surface of a black primer, and the outside of Sample Q4 has only a black primer layer. That is to say, most of the samples have a black primer layer directly painted on the surface of a wooden body, and the black primer is covered by a red lacquer film or ornamentation; only one sample has a black primer without a lacquer film or ornamentation. The red lacquer film has a smooth surface and a more uniform thickness than does the black film. The results of EDS and XRD indicate that the main components of red and black films are cinnabar (HgS) and carbon black, respectively. The above workmanship is different from that of the lacquerware unearthed from Chu area, but is similar with those from Mawangdui M2, Dongshan Tomb in Guangzhou and Fengpengling M1 in Changsha. This illustrates that there might exist a workmanship exchange or product trade between Bashu, Lingnan and Changsha areas. Furthermore, no obvious crack or infrared absorption peak induced by degradation was observed in Sample Q3, indicating a better preservation condition than the others. Compared with previous research on the tomb at Shuangbaoshan, this study focuses more on scientific and technological analyses of cross-section morphology of lacquer samples, pigment and film compositions and aging degrees, etc., revealing the workmanship and preservation conditions of lacquerware from the tomb. Comparison of the workmanship between the tomb at Shuangbaoshan and other different regions could provide evidence for the workmanship exchange or product trade.