Biodegradable poly(butylene succinate) (PBS) foams with high performance are usually difficult to be prepared because of its lower melt viscosity. Herein, high-melt-viscosity PBS was firstly prepared by combining the in situ reaction between carboxyl-ended polyester (CP) and solid epoxy (SE) both as viscosifier and strengthening agent with the presence of crosslinking agent of dicumyl peroxide (DCP) and crosslinking co-agent of trimethylolpropane trimethacrylate. Then enhanced PBS foams were successfully prepared by the traditional chemical compression-molding method. Furthermore, the content effects of CP/SE, blowing agent azodicarbonamide, and DCP on the properties and morphologies of enhanced PBS foams were studied in details. Results revealed that the tensile strength of the as-prepared PBS foams was as high as 32.3 MPa with the density of 0.58 g/cm(3), which was higher than that of pure PBS resin (25.6 MPa). POLYM. ENG. SCI., 56:1275-1282, 2016. (c) 2016 Society of Plastics Engineers