服务器的server.properties里的network-compression-threshold=等于号后面跟最高建筑高度，默认256

#Minecraft server properties
#Sat Jan 16 13:39:09 CST 2021
generator-settings=
op-permission-level=4
allow-nether=true
level-name=world
enable-query=false
allow-flight=true
announce-player-achievements=true
server-port=10703
level-type=DEFAULT
enable-rcon=false
force-gamemode=0
level-seed=
server-ip=42.51.15.194
max-build-height=80
spawn-npcs=true
white-list=false
spawn-animals=true
snooper-enabled=true
hardcore=false
online-mode=false
server-id=unnamed
resource-pack=
pvp=true
difficulty=1
enable-command-block=true
server-name=Unknown Server
player-idle-timeout=0
gamemode=0
max-players=100
spawn-monsters=true
view-distance=10
generate-structures=true
spawn-protection=16
motd=A Minecraft Server

max-build-height=<最高建筑高度>

服务端根目录的“server.properties”文件内

打开它找到这个选项！！！