•115 CHB patients were divided into two groups: 61 CHB only and 54 complicated with NAFLD.
•The diagnostic value and related factors of FibroTouch in liver inflammation, fibrosis and fatty liver disease were analyzed.
•Student t test was used in quantitative data analysis, and difference between groups was analyzed by using one way analysis of variance (ANOVA). The qualitative data were compared by chi-square test.

•In 115 patients, the liver stiffness value was (8.22 ± 6.33) kPa, fat attenuation parameter was (242.37 ± 31.56) dB/m. The fat attenuation parameters, body mass index (BMI), total cholesterol, triacylglycerol and glucose of CHB patients with NAFLD group were higher than those of CHB group, with statistically significant differences (all P < 0.05).
•54 patients diagnosed with CHB complicated with NAFLD were divided into mild, moderate and severe subgroups according to the degree of liver fat. The fat attenuation parameter increased along with the degree of liver fat (P < 0.05).
•The sensitivity of fat attenuation parameter was 92.6% and the specificity was 85.0%. In same grades of fibrosis and inflammation, the fat attenuation parameter of patients with CHB complicated with NAFLD was higher than patients with CHB only, with statistically significant difference (P < 0.05).
•There were no statistically significant differences of fat attenuation parameter with different degree of liver inflammation (X2 = 5.901, P = 0.117) and fibrosis (X2 = 4.073, P = 0.254) in the two groups.