A lifting-cover type frying-roasting device is provided. The frying-roasting device comprises a bottom base (1), an oil storing plate (2), an electric heating frying-roasting plate (3) and an upper cover (4). There is respectively a boss (15) extending backwards at two sides of the back end of the bottom base (1). A r-shaped orbit (16) whose opening is from its back end and extends toward its front lower part is respectively set in the inside of each boss (15). There is respectively a short jointed shaft (42) extending outward at the back end of two sides of the upper cover (4). Each short jointed shaft (42) is inserted in the corresponding r-shaped orbit (16) so that the hinging connection between them is formed. There is respectively a block wall (17) that extends from the back end to the inside of each boss (15). The height of two blocking walls (17) is lower than the opening of the r-shaped orbit (16). When the upper cover (4) is opened, the lower end of the back connecting member (41) of the upper cover (4) is blocked by the back end of the electric heating frying-roasting plate (3) and the upper end of the back connecting member (41) is blocked by two blocking walls (17) so that the upper cover remains sloped.