The invention discloses a sparse distribution type sex pheromone releaser which comprises a first cavity (1), a second cavity (2) and a liquid container (11), wherein the bottom of the first cavity (1) is connected with the bottom of the second cavity (2), the first cavity (1) can contain the second cavity (2) to form an outer cavity (4) which is filled with liquid, inner space of the second cavity (2) forms an inner cavity (3), two kinds of openings or notches which are formed alternately are formed in the lower end of the first cavity (1) and the lower end of the second cavity (2), the openings or notches, belonging to one kind, are communicated with the inner cavity (3) and outer space, sex pheromones in the inner cavity (3) can be released to the outer space through a large arc opening (8), and the openings or notches, belonging to the other kind, are communicated with the outer cavity (4) and the outer space. The releaser solves the problems that in traditional insect sex pheromone isotropic prevention, waste is caused, and sex pheromone prevention cost is high due to the fact that the sex pheromones are easily oxidized to lose efficacy, are uncontrollable and are released in an all-weather mode.