A left atrial appendage occluder, including a closure disc and a bracket connected to the closure disc; the closure disc includes a frame; the frame includes a proximal-end disc face and a distal-end disc face; the proximal-end disc face includes flexible proximal-end support rods arranged radially; the distal-end disc face includes flexible distal-end support rods arranged radially; the floating end of each of the flexible proximal-end support rods is connected to the floating end of the adjacent flexible distal-end support rod The flexible proximal-end support rod at the point of largest diameter of the closure disc is arranged independent of the distal-end support rod; thus the degree of freedom of deformation at the point of largest diameter of the closure disc is increased, ensuring that the outer edge of the closure disc may adapt to fit the openings of various irregular left atrial appendages.