The invention relates to a bidirectional throttle valve. The bidirectional throttle valve comprises a valve pipe, a communicating piece, a first valve element assembly and a second valve element assembly. The communicating piece is arranged in the valve pipe and divides the interior of the valve pipe into a first valve cavity and a second valve cavity. The communicating piece is provided with a first cavity, a second cavity, a first channel and a second channel, the first cavity is located in the end, close to the first valve cavity, of the communicating piece, the second cavity is located inthe end, close to the second valve cavity, of the communicating piece, the first channel communicates with the first cavity and the second valve cavity, and the second channel communicates with the second cavity and the first valve cavity. The first valve element assembly is arranged at the first cavity. The second valve element assembly is arranged at the second cavity. The first channel and thesecond channel are both arranged to be linear channels inclined relative to the axial direction of the communicating piece. According to the bidirectional throttle valve, the number of parts is small,the structure is simple, the installation process is very simple, and therefore the production cost of the bidirectional throttle valve is greatly reduced. When fluid flows in the first channel and the second channel, the flow resistance is small, and therefore the stability of the bidirectional throttle valve is better.